WO2018021774A1 - Bonded-type optical sheet module - Google Patents

Bonded-type optical sheet module Download PDF

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Publication number
WO2018021774A1
WO2018021774A1 PCT/KR2017/007938 KR2017007938W WO2018021774A1 WO 2018021774 A1 WO2018021774 A1 WO 2018021774A1 KR 2017007938 W KR2017007938 W KR 2017007938W WO 2018021774 A1 WO2018021774 A1 WO 2018021774A1
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WO
WIPO (PCT)
Prior art keywords
light
sheet
optical sheet
adhesive layer
module
Prior art date
Application number
PCT/KR2017/007938
Other languages
French (fr)
Korean (ko)
Inventor
이동철
이태준
이우종
조성식
Original Assignee
주식회사 엘엠에스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 주식회사 엘엠에스 filed Critical 주식회사 엘엠에스
Priority to CN201780042176.5A priority Critical patent/CN109477939A/en
Publication of WO2018021774A1 publication Critical patent/WO2018021774A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/34—Optical coupling means utilising prism or grating
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer

Definitions

  • the present invention relates to a bonded optical sheet module, and more particularly, the bonded optical sheet module and a backlight having the same disposed along the circumference between the light collecting sheet and the diffusion sheet to block the light lost to the outside at the same time bonding. It's about the unit.
  • liquid crystal display requires a backlight unit that provides uniform light to the entire screen, unlike a conventional CRT.
  • the conventional backlight unit has a lamp which is a line light source and a lamp reflector reflecting light of the lamp is disposed on one side of the light guide unit for converting light from the lamp into a surface light source, and a lower part of the light guide unit is provided for preventing leakage of light.
  • the reflective sheet is arranged. Then, a prism sheet having a plurality of triangular linear prisms is placed thereon to focus scattered light.
  • the backlight unit developed through this method has a problem in that the emitted light does not spread evenly throughout the light guide unit because a plurality of lamps, which are light sources, are disposed to be spaced apart from each other.
  • the central portion of the front direction of the display is bright and darkens toward the periphery. Therefore, the fall of the brightness
  • the present invention is to solve the problems as described above, the object of the present invention, in the backlight unit includes an adhesive layer applied to the outermost and bonded to each other along the circumference of the light collecting sheet and the diffusion sheet, a separate black ink to the adhesive layer It is to provide a bonded optical sheet module that can improve the light leakage effect by preventing the light emitted from the light source to leak through the circumference of the light collecting sheet and the diffusion sheet.
  • the present invention relates to a light collecting sheet having a unit condenser for condensing light transmitted from a lower part and transmitting to an upper part, a diffusion sheet laminated at a lower part of the light collecting sheet and diffusing light transmitted from a lower part to the light collecting sheet; It is provided on at least a portion along the circumference of the diffusion sheet and the light collecting sheet and includes an adhesive layer for bonding the diffusion sheet and the light collecting sheet to prevent peeling.
  • the adhesive layer may include a black ink therein to shield the light from being lost to the outside in the inner space between the light collecting sheet and the diffusion sheet.
  • the adhesive layer is provided in a first area of the periphery of the light collecting sheet and the diffusion sheet, the light source is located in the second area, the shielding portion including the black ink and the remaining portion other than the shielding portion is collected. It may include a bonding portion for bonding the sheet and the diffusion sheet.
  • junction part may have a predetermined pattern in the second area, and a plurality of junction parts may be spaced apart from each other.
  • the bonding portion may be formed so as to decrease the adhesion width in the direction away from the light source.
  • the bonding part may include at least a portion of the black ink to shield the light from going out in the internal space.
  • the adhesive layer may include a separate silica beads therein to prevent deformation from occurring due to temperature and humidity.
  • the adhesive layer may be provided with a separate reflective coating on the bottom to recycle light lost to the outside in the internal space.
  • the backlight unit according to another aspect of the present invention includes the above-described optical sheet module.
  • FIG. 1 is an exploded perspective view showing the configuration of a backlight unit equipped with an optical sheet module according to an embodiment of the present invention
  • FIG. 2 is a side view of an optical sheet module in the backlight unit of FIG. 1;
  • FIG. 3 is a view showing a state in which an adhesive layer is applied in the optical sheet module of FIG.
  • FIG. 4 is a view showing a modified state of the adhesive layer in the optical sheet module of FIG.
  • FIG. 5 is a view showing the top and bottom cross-sectional shape of the adhesive layer in the optical sheet module of FIG.
  • FIG. 6 is a view showing a state in which a separate bead is further included inside the adhesive layer in the optical sheet module of FIG.
  • FIG. 7 is a view illustrating a state in which the separate reflective coating is further provided on the adhesive layer in the optical sheet module of FIG. 2.
  • An optical sheet module will be described by taking an example that is applied to a backlight unit of a flat panel liquid crystal display such as an LCD or an LED panel.
  • the present invention is not necessarily limited thereto, and may be used alone as an optical sheet, or may be a backlight unit applied to another apparatus other than the liquid crystal display device, or may change a characteristic and a path of light such as a lighting fixture. Any device may be used.
  • FIGS. 1 to 3 a schematic configuration of a backlight unit to which an optical sheet module according to an embodiment of the present invention is applied is as follows.
  • FIG. 1 is an exploded perspective view showing the configuration of a backlight unit with an optical sheet module according to an embodiment of the present invention
  • Figure 2 is a view showing the side of the optical sheet module in the backlight unit of Figure 1
  • Figure 3 is Figure 2
  • Figure is a view showing a state in which the adhesive layer is applied in the optical sheet module.
  • a back light unit (BLU) for providing light to the liquid crystal panel must be provided in constructing the liquid crystal display.
  • the backlight unit includes a light emitting unit 100, an adhesive layer 200, a diffusion sheet 300, and a light collecting sheet 400.
  • the light emitting unit 100 includes a light source 110, a reflector 120, and a light guide plate 130 in a configuration of transmitting light emitted from the light emitting unit 100 into a surface light source.
  • the light source 110 generally generates light at the side of the light guide plate 130 and transmits light to the light guide plate 130.
  • an LED Light Emitting Diode
  • CCFL Cold Cathode Fluorescent Lamp
  • the light source 110 may be composed of at least one or more, and may emit light toward the side of the light guide plate 130.
  • the light incident on the light guide plate 130 proceeds with total reflection inside the light guide plate 130, and the light incident on the surface of the light guide plate 130 at an angle of incidence smaller than the critical angle is transmitted without being totally reflected, and thus is emitted upward. .
  • the reflector 120 is provided below the light guide plate 130, and is configured to increase light efficiency by reflecting light emitted from the inside of the light guide plate 130 to the light guide plate 130.
  • the light emitting unit 100 is configured as described above, and the light emitted from the light source 110 is transmitted to the upper diffusion sheet 300 in the form of a surface light source by the light guide plate 130 and the reflector plate 120.
  • the diffusion sheet 300 is disposed on the light guide plate 130 to diffuse the light and to be evenly transferred to the light collecting sheet (400).
  • the diffusion sheet 300 is configured to uniformly diffuse the light transmitted to the upper portion through the light guide plate 130 and the reflecting plate 120 provided at the lower portion, and transmit the light to the light collecting sheet 400 positioned at the upper portion.
  • the diffusion sheet 300 has a non-uniform diffusion pattern is formed on the upper surface or the lower surface or formed on both sides, it serves to diffuse the light.
  • the diffusion pattern is formed in the form of a spherical protrusion of non-uniform size to diffuse the light.
  • the light collecting sheet 400 is arranged in the form of being laminated or bonded to the upper portion of the diffusion sheet 300 to collect the light transmitted and move to the top.
  • the light collecting sheet 400 may be formed in the form of a single prism sheet, or may be formed in the form of a plurality of laminated prismatic sheet.
  • the light condensing sheet 400 configured as described above collects light by refracting the light transmitted through the diffusion sheet upward.
  • the light condensing sheet 400 includes a plurality of unit condensers having a regular prism shape, and includes the upper optical sheet 410 and the lower optical sheet 420.
  • the upper optical sheet 410 is largely composed of a first base film 414 and a first structured pattern 412.
  • a light transmissive film is generally used to easily transmit light incident from the bottom.
  • An upper surface of the first base film 414 is formed such that the first structured pattern 412 for refracting and condensing incident light is integrated with the first base film 414.
  • the first structured pattern 412 is configured such that a plurality of unit condensers are formed on the surface of the first base film 414 continuously and protrude in an upward direction to form a plurality of unit condensers having an inclined surface having a smaller cross sectional area toward the top. do.
  • the unit condenser refracts and condenses the light transmitted through the first base film 414 and transmits the light to the upper portion.
  • the first structured pattern 412 includes a plurality of prismatic shapes formed so that upper and lower end surfaces of a triangular shape extend in one direction.
  • the lower optical sheet 420 may be formed similarly to the upper optical sheet 410 described above, and the second base film 424 and the second structured pattern 422 are largely formed.
  • the second structured pattern 422 is formed on the lower surface of the upper optical sheet 410 and is formed on an upper surface of the second base film 424.
  • the second base film 424 transmits the light transmitted from the diffusion sheet 300 disposed below and to the upper side, and at the same time, the second structured pattern ( 422 is formed.
  • the second structured pattern 422 is formed to have a smaller cross sectional area toward the top, and the second structured pattern 422 refracts and condenses the light transmitted from the diffusion sheet 300 to the top. .
  • the second structured pattern 422 includes a plurality of unit condensers having an inclined surface on an upper surface of the second base film 424 and formed to have a small cross-sectional area in an upward direction.
  • the first structured pattern 412 and the second structured pattern 422 are each formed by repeatedly providing the unit condenser continuously.
  • first structured pattern 412 and the second structured pattern 422 may be composed of the unit condensers having the same shape and size as shown, or may be formed to have different shapes or sizes. It may be.
  • the light condensing sheet 400 includes the upper optical sheet 410 and the lower optical sheet 420, and the upper optical sheet 410 and the lower optical sheet 420 are arranged to cross each other. do.
  • the upper optical sheet 410 and the lower optical sheet 420 may be stacked or bonded to each other.
  • the light collecting sheet 400 may be formed to have an inverted prism shape so that the unit light collecting body is provided on a lower surface thereof to condense light through total internal reflection of light.
  • the adhesive layer 200 is provided at least in part along the circumference of the diffusion sheet 300 and the light collecting sheet 400 and the peeling occurs by bonding the diffusion sheet 300 and the light collecting sheet 400. To prevent them.
  • the adhesive layer 200 as shown in Figures 2 and 3 is configured to bond between the diffusion sheet 300 and the light collecting sheet 400, it is applied to the outermost along the circumference do.
  • the diffusion sheet 300 and the light collecting sheet 400 are adhered to each other by the adhesive layer 200 applied as described above, and then, through the punching operation, the diffusion sheet 300, the light collecting sheet 400, and the adhesive layer ( A part of 200) will be removed.
  • the adhesive layer 200 is removed after leaving only a minimum area for bonding the diffusion sheet 300 and the light collecting sheet 400.
  • the adhesive layer 200 includes a separate black ink (not shown), which is leaked to the outside in the internal space (S) between the light collecting sheet 400 and the diffusion sheet 300 is lost. Configured to shield.
  • the adhesive layer 200 may include at least a portion of the black ink, and thus may serve as a light shielding tape to shield occurrence of light leakage.
  • the adhesive layer 200 is provided in the first area (A) which is the side of the light source 110 is located around the light collecting sheet 400 and the diffusion sheet 300 and the Bonding portion 220 provided in the shielding portion 210 including the black ink and the second region (B) except for the shielding portion 210 to bond the light collecting sheet 400 and the diffusion sheet 300 ).
  • the shielding portion 210 is provided in the first region A adjacent to the light source 110 as shown, and includes the black ink, thereby serving as a light shielding tape in addition to the adhesive function. That is, it is possible to reduce the variation in the intensity of the light generated due to the portion or the gap that the light of the plurality of light sources 110 does not reach.
  • the bonding portion 220 is provided on the second area (B), it is bonded to prevent the separation of the light collecting sheet 400 and the diffusion sheet (300).
  • the junction 220 may include the black ink described above, or alternatively, may be composed of only an adhesive.
  • the adhesive layer 200 includes the shielding portion 210 and the bonding portion 220, and stably bonds the light collecting sheet 400 and the diffusion sheet 300 to the outside of the outermost portion. The improvement can be prevented from occurring.
  • the adhesive layer 200 includes a black ink
  • the light emitted from the light emitting unit 100 may be prevented from leaking out of the internal space S, thereby reducing the variation in the intensity of light.
  • FIG. 4 is a view illustrating a modified state of the adhesive layer 200 in the optical sheet module of FIG. 2, and FIG. 5 is a top and bottom cross-sectional view of the adhesive layer 200 in the optical sheet module of FIG. 4.
  • the junction part 220 is not applied to the entire second area B, but a plurality of them have a predetermined pattern and are spaced apart from each other.
  • the plurality of bonding parts 220 are disposed to be spaced apart from each other in the second area B, so that only a part of the bonding part 220 is not applied to the upper surface of the circumferential part of the diffusion sheet 300 so that light transmitted from the lower part is more stably. Can spread.
  • the junction 220 may be configured to have a vertical cross-sectional shape of various forms, as shown in Figure 5, it may be formed differently the size and spacing interval of the junction 220 according to the characteristics.
  • junction 220 may be formed to have a smaller adhesive width toward the direction away from the light source 110.
  • junction portion 222 may be formed in the shape of the junction portion 220 in various forms as shown in Figure 5, the area bonded to the lower portion of the light collecting sheet 400 of the upper according to the cross-sectional shape of the junction portion 220 This changes, and thus the luminance changes.
  • the area bonded to the lower optical sheet 420 at the upper part is large, and thus the adhesive force is increased, but the light loss depends on the adhesion area. Can be generated so that the brightness can be reduced.
  • the overall brightness and the adhesive force with the lower optical sheet 420 may be adjusted according to the cross-sectional shape in the vertical direction of the junction 220.
  • FIG. 6 is a view illustrating a state in which an additional bead 230 is further included inside the adhesive layer 200 in the optical sheet module of FIG. 2
  • FIG. 7 is a separate reflection on the adhesive layer 200 in the optical sheet module of FIG. 2.
  • the adhesive layer 200 according to the present invention may further include separate silica beads 230 as well as the adhesive and the black ink.
  • the bonding force of the adhesive layer 200 itself may be increased to minimize deformation of the light collecting sheet 400 and the diffusion sheet 300.
  • the adhesive layer 200 may prevent the deformation by supporting it.
  • the adhesive layer 200 may include the bead 230 together with the black ink, and the bonding part 220 may be configured to include only the bead 230 without the black ink. It may be.
  • a separate reflection coating 240 may be further included in the adhesive layer 200 instead of the silica beads 230.
  • the adhesive layer 200 is provided with a separate reflection coating 240 at the bottom, thereby reflecting the light leaking out from the internal space (S).
  • the reflective coating 240 recycles the light lost at the outermost sides of the diffusion sheet 300 and the light collecting sheet 400 and transfers the light back to the internal space S, thereby increasing the overall brightness.
  • the reflective coating 240 is made of silver (Ag), and various materials may be applied thereto.
  • the adhesive layer 200 may be configured to include black ink at least in part, and unlike the shielding part 210, the bonding part 220 may not be configured to include the black ink.

Abstract

The present invention relates to an optical sheet module which is laminated on a light emitting unit including a light source disposed on one side of the perimeter thereof and a light guiding portion for upwardly transmitting light emitted from the light source, and provides an optical sheet module comprising: a light collecting sheet having a light collector unit formed on one surface thereof, the light collector unit collecting light transmitted from below and transmitting the collected light upward; a diffusing sheet, laminated below the light collecting sheet, for diffusing light transmitted from below into the light collecting sheet; and an adhesive layer, disposed at least a part of a perimeter between the diffusing sheet and the light collecting sheet, for bonding the diffusing sheet and the light collecting sheet to prevent the delamination thereof, the adhesive layer including a black ink to block the escape of light from an inner space between the light collecting sheet and the diffusing sheet to the outside.

Description

접합형 광학시트 모듈Bonded Optical Sheet Module
본 발명은 접합형 광학시트 모듈에 관한 것으로서, 좀 더 자세하게는, 집광시트와 확산시트 사이의 둘레를 따라 배치되어 접합과 동시에 외부로 손실되는 광을 차단하는 접합형 광학시트 모듈 및 이를 구비한 백라이트 유닛에 관한 것이다.The present invention relates to a bonded optical sheet module, and more particularly, the bonded optical sheet module and a backlight having the same disposed along the circumference between the light collecting sheet and the diffusion sheet to block the light lost to the outside at the same time bonding. It's about the unit.
근래에 들어 평판 디스플레이 패널의 사용이 확대되고 있으며, 그 중 대표적으로 액정표시장치가 있다. In recent years, the use of flat panel display panels has been expanded, and among them, liquid crystal displays are representative.
일반적으로, 상기 액정표시장치(LCD)는 종래의 브라운관 방식(CRT)와는 달리 화면 전체에 균일한 광을 제공하는 백라이트 유닛이 필요하다.In general, the liquid crystal display (LCD) requires a backlight unit that provides uniform light to the entire screen, unlike a conventional CRT.
종래의 백라이트 유닛은 선광원인 램프와 상기 램프의 광을 반사시키는 램프 반사판이 램프로부터의 광을 면광원으로 바꿔주기 위한 도광유닛의 한 측면에 배치되어 있고, 도광유닛의 하부에는 광의 누출을 막기 위한 반사시트가 배치되어 있다. 그리고, 위에는 흩어진 광을 집광시키기 위해 삼각형 모양의 선형 프리즘을 다수 개 가지는 프리즘 시트가 놓여진다.The conventional backlight unit has a lamp which is a line light source and a lamp reflector reflecting light of the lamp is disposed on one side of the light guide unit for converting light from the lamp into a surface light source, and a lower part of the light guide unit is provided for preventing leakage of light. The reflective sheet is arranged. Then, a prism sheet having a plurality of triangular linear prisms is placed thereon to focus scattered light.
이러한 방식을 통해 개발된 백라이트 유닛은 광원인 램프가 복수 개로 구성되어 이격 배치되어 있어 출사되는 광이 도광유닛 전체에 고르게 퍼지지 않는 문제가 발생하였다.The backlight unit developed through this method has a problem in that the emitted light does not spread evenly throughout the light guide unit because a plurality of lamps, which are light sources, are disposed to be spaced apart from each other.
그리고 이에 따라 디스플레이의 정면 방향의 중심부는 밝고 주변부에 갈수록 어두워지는 특성은 피할 수 없다. 따라서 액정화면을 옆에서 보았을 때의 휘도의 저하가 크고 광의 이용 효율의 저하를 초래하고 있었다.As a result, the central portion of the front direction of the display is bright and darkens toward the periphery. Therefore, the fall of the brightness | luminance when a liquid crystal screen is seen from the side was large, and the fall of the light utilization efficiency was caused.
뿐만 아니라 복수 개가 적층된 프리즘 시트의 경우 상호 적층된 사이 공간에 의해 하부에서 전달되는 광이 외부로 새어나가기 때문에 이에 따른 휘도 저하가 발생한다.In addition, in the case of a plurality of laminated prism sheets, light transmitted from the lower portion is leaked to the outside by the inter-layered interspaces, thereby causing a decrease in luminance.
또한, 복수 개의 프리즘 시트를 적층시키는 경우 온도나 습도 변화에 의해 박리가 발생할 수 있기 때문에 안정적으로 접착시키는 접착층이 필요한 문제점이 있다 In addition, when the plurality of prism sheets are stacked, peeling may occur due to temperature or humidity changes, and thus there is a problem in that an adhesive layer for stably bonding is required.
이와 같은 문제의 해결을 위해 프리즘 시트를 안정적으로 접합시킴과 동시에 외부로 광이 새어나가 휘도가 저하되는 것을 방지할 수 있는 광학시트 모듈의 개발이 필요한 실정이다.In order to solve such a problem, there is a need for the development of an optical sheet module that can stably bond the prism sheet and at the same time prevent the light from leaking out and deteriorating the luminance.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로 본 발명의 과제는, 백라이트 유닛에서 집광시트와 확산시트의 둘레를 따라 최외각에 도포되어 상호 접합시키는 접착층을 포함하며, 접착층에 별도의 블랙잉크를 포함하여 광원에서 출사된 광이 집광시트 및 확산시트의 둘레를 통해 새는 것을 방지함으로써 광샘 효과를 개선할 수 있는 접합형 광학시트 모듈을 제공함에 있다.The present invention is to solve the problems as described above, the object of the present invention, in the backlight unit includes an adhesive layer applied to the outermost and bonded to each other along the circumference of the light collecting sheet and the diffusion sheet, a separate black ink to the adhesive layer It is to provide a bonded optical sheet module that can improve the light leakage effect by preventing the light emitted from the light source to leak through the circumference of the light collecting sheet and the diffusion sheet.
상기와 같은 과제를 해결하기 위하여 본 발명의 일측면에 따르면 둘레에 따른 일측에 배치되는 광원 및 상기 광원에서 출사된 광을 상부로 전달하는 도광부를 포함하는 발광유닛의 상부에 적층되는 광학시트 모듈에 관한 것으로, 일면에 하부에서 전달되는 광을 집광하여 상부로 전달하는 단위집광체가 형성된 집광시트, 상기 집광시트의 하부에서 적층되며 하부에서 전달되는 광을 확산하여 상기 집광시트로 전달하는 확산시트 및 상기 확산시트와 상기 집광시트의 둘레를 따라 적어도 일부에 구비되며 상기 확산시트와 상기 집광시트를 접합시켜 박리가 발생하는 것을 방지하는 접착층을 포함한다. According to an aspect of the present invention to solve the above problems in the optical sheet module laminated on the upper portion of the light emitting unit including a light source disposed on one side along the circumference and the light guide portion for transmitting the light emitted from the light source to the top The present invention relates to a light collecting sheet having a unit condenser for condensing light transmitted from a lower part and transmitting to an upper part, a diffusion sheet laminated at a lower part of the light collecting sheet and diffusing light transmitted from a lower part to the light collecting sheet; It is provided on at least a portion along the circumference of the diffusion sheet and the light collecting sheet and includes an adhesive layer for bonding the diffusion sheet and the light collecting sheet to prevent peeling.
또한, 상기 접착층은 내부에 블랙잉크를 포함하여 상기 집광시트와 상기 확산시트 사이의 내부공간에서 광이 외부로 손실되는 것을 차폐할 수 있다.In addition, the adhesive layer may include a black ink therein to shield the light from being lost to the outside in the inner space between the light collecting sheet and the diffusion sheet.
또한, 상기 접착층은 상기 집광시트 및 상기 확산시트의 둘레 중에서 상기 광원이 위치한 측인 제1영역에 구비되며 상기 블랙잉크를 포함하는 차폐부 및 상기 차폐부를 제외한 나머지 부분인 제2영역에 구비되어 상기 집광시트와 상기 확산시트를 접합시키는 접합부를 포함할 수 있다.In addition, the adhesive layer is provided in a first area of the periphery of the light collecting sheet and the diffusion sheet, the light source is located in the second area, the shielding portion including the black ink and the remaining portion other than the shielding portion is collected. It may include a bonding portion for bonding the sheet and the diffusion sheet.
또한, 상기 접합부는 상기 제2영역내에서 일정한 패턴을 가지며, 복수 개가 이격되어 배치될 수 있다.In addition, the junction part may have a predetermined pattern in the second area, and a plurality of junction parts may be spaced apart from each other.
또한, 상기 접합부는 상기 광원에서 멀어지는 방향으로 갈수록 접착폭이 작아지도록 형성될 수 있다.In addition, the bonding portion may be formed so as to decrease the adhesion width in the direction away from the light source.
또한, 상기 접합부는 적어도 일부에 상기 블랙잉크를 포함하여 상기 내부공간에서 광이 외부로 나가는 것을 차폐할 수 있다.In addition, the bonding part may include at least a portion of the black ink to shield the light from going out in the internal space.
또한, 상기 접착층은 내부에 별도의 실리카 비드를 포함하여 온도 및 습도에 의해 변형이 발생하는 것을 방지할 수 있다.In addition, the adhesive layer may include a separate silica beads therein to prevent deformation from occurring due to temperature and humidity.
또한, 상기 접착층은 하부에 별도의 반사코팅이 구비되어 내부공간에서 외부로 손실되는 광을 리사이클링 시킬 수 있다.In addition, the adhesive layer may be provided with a separate reflective coating on the bottom to recycle light lost to the outside in the internal space.
한편, 상기와 같은 과제를 해결하기 위하여 본 발명의 다른 측면에 따른 백라이트 유닛은 상술한 광학시트 모듈을 포함한다. On the other hand, in order to solve the above problems, the backlight unit according to another aspect of the present invention includes the above-described optical sheet module.
상기 문제점을 해결하기 위해 본 발명에 따르면 다음과 같은 효과가 있다.According to the present invention to solve the above problems has the following effects.
첫째, 집광시트와 확산시트 사이에서 가장자리의 둘레를 따라 형성되며, 내부에 블랙잉크를 포함한 접착층이 구비됨으로써, 하부에서 전달되는 광이 외부로 새어나가는 것을 방지하여 휘도가 감소하는 것을 방지할 수 있는 이점이 있다.First, formed along the periphery of the edge between the light collecting sheet and the diffusion sheet, and provided with an adhesive layer including a black ink therein, it is possible to prevent the light transmitted from the lower side to leak out to prevent the brightness is reduced There is an advantage.
둘째, 접착층이 내부에 별도의 실리카 비드를 포함하여 접착층 자체의 접착력을 증가시킴으로써, 온도나 습도에 의해 집광시트와 확산시트의 변형을 저감시킬 수 있다.Second, by increasing the adhesive strength of the adhesive layer itself by including a separate silica beads in the adhesive layer therein, it is possible to reduce the deformation of the light collecting sheet and the diffusion sheet by temperature or humidity.
본 발명의 효과들은 상기 언급한 효과에 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.
도 1은 본 발명의 실시예에 따른 광학시트 모듈이 구비된 백라이트 유닛의 구성을 나타낸 분해사시도;1 is an exploded perspective view showing the configuration of a backlight unit equipped with an optical sheet module according to an embodiment of the present invention;
도 2는 도 1의 백라이트 유닛에서 광학시트 모듈의 측면을 나타낸 도면;FIG. 2 is a side view of an optical sheet module in the backlight unit of FIG. 1; FIG.
도 3은 도 2의 광학시트 모듈에서 접착층이 도포된 상태를 나타낸 도면;3 is a view showing a state in which an adhesive layer is applied in the optical sheet module of FIG.
도 4는 도 2의 광학시트 모듈에서 접착층의 변형된 상태를 나타낸 도면;4 is a view showing a modified state of the adhesive layer in the optical sheet module of FIG.
도 5는 도 4의 광학시트 모듈에서 접착층의 상하 단면 형태를 나타낸 도면;5 is a view showing the top and bottom cross-sectional shape of the adhesive layer in the optical sheet module of FIG.
도 6은 도 2의 광학시트 모듈에서 접착층 내부에 별도의 비드가 더 포함된 상태를 나타낸 도면; 및6 is a view showing a state in which a separate bead is further included inside the adhesive layer in the optical sheet module of FIG. And
도 7은 도 2의 광학시트 모듈에서 접착층에 별도의 반사코팅이 더 구비된 상태를 나타낸 도면이다.FIG. 7 is a view illustrating a state in which the separate reflective coating is further provided on the adhesive layer in the optical sheet module of FIG. 2.
이하 본 발명의 목적이 구체적으로 실현될 수 있는 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 설명한다. 본 실시예를 설명함에 있어서, 동일 구성에 대해서는 동일 명칭 및 동일 부호가 사용되며 이에 따른 부가적인 설명은 생략하기로 한다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.
본 발명의 일 실시예에 따른 광학시트 모듈은 LCD나 LED 패널 등의 평판 액정표시장치의 백라이트 유닛에 적용되는 것을 예로 들어 설명하기로 한다. 허나, 본 발명은 반드시 이에 한정되는 것은 아니며, 광학시트 단독으로 사용될 수도 있으며, 또는 액정표시장치에 적용되는 것이 아닌 다른 기구에 적용되는 백라이트 유닛일 수도 있으며, 또는 조명기구 등 광의 특성 및 경로를 변화시키는 장치라면 어느 것에도 적용될 수도 있다.An optical sheet module according to an embodiment of the present invention will be described by taking an example that is applied to a backlight unit of a flat panel liquid crystal display such as an LCD or an LED panel. However, the present invention is not necessarily limited thereto, and may be used alone as an optical sheet, or may be a backlight unit applied to another apparatus other than the liquid crystal display device, or may change a characteristic and a path of light such as a lighting fixture. Any device may be used.
먼저, 도 1 내지 도 3을 참조하여 본 발명의 실시예에 따른 광학시트 모듈이 적용된 백라이트 유닛의 개략적인 구성에 대해서 살펴보면 다음과 같다.First, referring to FIGS. 1 to 3, a schematic configuration of a backlight unit to which an optical sheet module according to an embodiment of the present invention is applied is as follows.
도 1은 본 발명의 실시예에 따른 광학시트 모듈이 구비된 백라이트 유닛의 구성을 나타낸 분해사시도이고, 도 2는 도 1의 백라이트 유닛에서 광학시트 모듈의 측면을 나타낸 도면이며, 도 3은 도 2의 광학시트 모듈에서 접착층이 도포된 상태를 나타낸 도면이다.1 is an exploded perspective view showing the configuration of a backlight unit with an optical sheet module according to an embodiment of the present invention, Figure 2 is a view showing the side of the optical sheet module in the backlight unit of Figure 1, Figure 3 is Figure 2 Figure is a view showing a state in which the adhesive layer is applied in the optical sheet module.
도시된 바와 같이, 액정표시장치를 구성함에 있어서, 액정패널에 광을 제공하는 백라이트 유닛(BLU: Back Light Unit)이 필수적으로 구비되어야 한다. As shown in the figure, a back light unit (BLU) for providing light to the liquid crystal panel must be provided in constructing the liquid crystal display.
이와 같은 백라이트 유닛은 크게 발광유닛(100), 접착층(200), 확산시트(300) 및 집광시트(400)를 포함한다.The backlight unit includes a light emitting unit 100, an adhesive layer 200, a diffusion sheet 300, and a light collecting sheet 400.
상기 발광유닛(100)은 발광되는 광을 면광원 형태로 변형하여 상부로 전달하는 구성으로 광원(110), 반사판(120) 및 도광판(130)을 포함한다.The light emitting unit 100 includes a light source 110, a reflector 120, and a light guide plate 130 in a configuration of transmitting light emitted from the light emitting unit 100 into a surface light source.
상기 광원(110)은 일반적으로 상기 도광판(130)의 측부에서 광을 발생시키며, 상기 도광판(130)으로 광을 전달한다. 이러한 광원(110)으로는 LED(Light Emitting Diode) 및 냉음극형광램프(Cold Cathode Fluorescent Lamp: CCFL) 등이 선택적으로 사용될 수 있다.The light source 110 generally generates light at the side of the light guide plate 130 and transmits light to the light guide plate 130. As the light source 110, an LED (Light Emitting Diode) and a Cold Cathode Fluorescent Lamp (CCFL) may be selectively used.
구체적으로 상기 광원(110)은 적어도 하나 이상으로 구성되어 복수 개로 구성될 수 있으며, 상기 도광판(130)의 측부를 향해 광을 발광한다.Specifically, the light source 110 may be composed of at least one or more, and may emit light toward the side of the light guide plate 130.
상기 도광판(130)으로 입사된 광은 도광판(130) 내부에서 전반사를 일으키며 진행하며, 임계각보다 작은 각도의 입사각으로 도광판(130)의 표면에 입사되는 광은 전반사 되지 않고 투과되므로, 상측으로 방출된다. The light incident on the light guide plate 130 proceeds with total reflection inside the light guide plate 130, and the light incident on the surface of the light guide plate 130 at an angle of incidence smaller than the critical angle is transmitted without being totally reflected, and thus is emitted upward. .
그리고 상기 반사판(120)은 상기 도광판(130)의 하부에 구비되며, 상기 도광판(130) 내부에서 외부로 방출된 광을 반사하여 상기 도광판(130)으로 재입사 시킴으로써 광효율을 증가시키도록 구성된다.The reflector 120 is provided below the light guide plate 130, and is configured to increase light efficiency by reflecting light emitted from the inside of the light guide plate 130 to the light guide plate 130.
이와 같이 상기 발광유닛(100)이 구성되며, 상기 광원(110)에서 출사된 광은 상기 도광판(130) 및 상기 반사판(120)에 의해 면광원 형태로 상부의 확산시트(300)에 전달된다. The light emitting unit 100 is configured as described above, and the light emitted from the light source 110 is transmitted to the upper diffusion sheet 300 in the form of a surface light source by the light guide plate 130 and the reflector plate 120.
한편, 상기 확산시트(300)는 상기 도광판(130)의 상부에 배치되어 광을 확산시키며 상기 집광시트(400)로 고르게 전달되도록 한다. On the other hand, the diffusion sheet 300 is disposed on the light guide plate 130 to diffuse the light and to be evenly transferred to the light collecting sheet (400).
구체적으로 상기 확산시트(300)는 하부에 구비된 상기 도광판(130) 및 상기 반사판(120)을 통해 상부로 전달되는 광을 고르게 확산하여 상부에 위치한 상기 집광시트(400)로 전달하는 구성이다. 상기 확산시트(300)은 불균일한 확산패턴이 상면 또는 하면에 형성되거나 양면에 형성됨으로써, 광을 확산시키는 역할을 한다.In detail, the diffusion sheet 300 is configured to uniformly diffuse the light transmitted to the upper portion through the light guide plate 130 and the reflecting plate 120 provided at the lower portion, and transmit the light to the light collecting sheet 400 positioned at the upper portion. The diffusion sheet 300 has a non-uniform diffusion pattern is formed on the upper surface or the lower surface or formed on both sides, it serves to diffuse the light.
이때, 상기 확산 패턴은 불균일한 크기의 구형 돌기 형태로 형성되어 광을 확산시킨다.At this time, the diffusion pattern is formed in the form of a spherical protrusion of non-uniform size to diffuse the light.
한편, 상기 집광시트(400)는 상기 확산시트(300)의 상부에 적층되거나 접합되는 형태로 배치되어 전달되는 광을 집광하여 상부로 이동시킨다. 여기서 상기 집광시트(400)는 단일한 형태의 역프리즘 시트 형태로 형성될 수도 있고, 복수 개가 적층되어 접합 된 정프리즘 시트 형태로 형성될 수도 있다.On the other hand, the light collecting sheet 400 is arranged in the form of being laminated or bonded to the upper portion of the diffusion sheet 300 to collect the light transmitted and move to the top. Here, the light collecting sheet 400 may be formed in the form of a single prism sheet, or may be formed in the form of a plurality of laminated prismatic sheet.
그리고 이와 같이 구성된 상기 집광시트(400)는 상기 확산시트를 투과하여 전달되는 광을 상부로 굴절시켜 집광한다.The light condensing sheet 400 configured as described above collects light by refracting the light transmitted through the diffusion sheet upward.
본 실시예에서 상기 집광시트(400)는 복수 개의 정프리즘 형태의 단위집광체를 포함하는 형태로, 상기 상부광학시트(410) 및 상기 하부광학시트(420)로 구성된다.In the present exemplary embodiment, the light condensing sheet 400 includes a plurality of unit condensers having a regular prism shape, and includes the upper optical sheet 410 and the lower optical sheet 420.
상기 상부광학시트(410)는 크게 제1베이스필름(414) 및 제1구조화패턴(412)으로 구성된다. The upper optical sheet 410 is largely composed of a first base film 414 and a first structured pattern 412.
상기 제1베이스필름(414)으로는 하부로부터 입사되는 광이 용이하게 투과할 수 있도록 광투과성 필름이 사용되는 것이 일반적이다. 상기 제1베이스필름(414)의 상면에는 입사된 광을 굴절 및 집광시키는 상기 제1구조화패턴(412)이 제1베이스필름(414)과 일체화 되도록 형성된다.As the first base film 414, a light transmissive film is generally used to easily transmit light incident from the bottom. An upper surface of the first base film 414 is formed such that the first structured pattern 412 for refracting and condensing incident light is integrated with the first base film 414.
상기 제1구조화패턴(412)은 상기 제1베이스필름(414)의 상면에서 연속적으로 반복되며 상부방향으로 돌출되어 상부로 갈수록 횡단면적이 작아지는 경사면이 형성된 복수 개의 단위집광체가 연속하여 형성되도록 구성된다.The first structured pattern 412 is configured such that a plurality of unit condensers are formed on the surface of the first base film 414 continuously and protrude in an upward direction to form a plurality of unit condensers having an inclined surface having a smaller cross sectional area toward the top. do.
상기 단위집광체는 상기 제1베이스필름(414)을 투과한 광을 굴절 및 집광시켜 상부로 전달한다.The unit condenser refracts and condenses the light transmitted through the first base film 414 and transmits the light to the upper portion.
일반적으로, 상기 제1구조화패턴(412)은 삼각형상의 상하단면이 일 방향을 따라 연장되도록 형성된 복수개의 프리즘 형상을 포함한다. In general, the first structured pattern 412 includes a plurality of prismatic shapes formed so that upper and lower end surfaces of a triangular shape extend in one direction.
한편, 본 발명의 실시예에 상기 하부광학시트(420)는 상술한 상기 상부광학시트(410)와 유사하게 형성될 수 있으며, 크게 제2베이스필름(424) 및 상기 제2구조화패턴(422)으로 구성되며, 상기 상부광학시트(410)의 하부에 배치되며 상기 제2베이스필름(424)의 상면에 상기 제2구조화패턴(422)이 형성되어 있다.Meanwhile, in the embodiment of the present invention, the lower optical sheet 420 may be formed similarly to the upper optical sheet 410 described above, and the second base film 424 and the second structured pattern 422 are largely formed. The second structured pattern 422 is formed on the lower surface of the upper optical sheet 410 and is formed on an upper surface of the second base film 424.
상기 제2베이스필름(424)은 상기 제1베이스필름(414)과 마찬가지로 하부에 배치된 상기 확산시트(300)로부터 전달되는 광을 투과시켜 상부로 전달함과 동시에 상면에 상기 제2구조화패턴(422)이 형성된다.Like the first base film 414, the second base film 424 transmits the light transmitted from the diffusion sheet 300 disposed below and to the upper side, and at the same time, the second structured pattern ( 422 is formed.
상기 제2구조화패턴(422)은, 상기 제1구조화패턴(412)과 유사하게 상부로 갈수록 횡단면적이 작아지도록 형성되며 상기 확산시트(300)로부터 전달되는 광을 굴절 및 집광시켜 상부로 전달한다.Similar to the first structured pattern 412, the second structured pattern 422 is formed to have a smaller cross sectional area toward the top, and the second structured pattern 422 refracts and condenses the light transmitted from the diffusion sheet 300 to the top. .
상기 제2구조화패턴(422)은 상기 제2베이스필름(424)의 상면에 경사면을 가지며 상부방향으로 횡단면적이 작아지도록 형성된 복수 개의 상기 단위집광체를 포함한다.The second structured pattern 422 includes a plurality of unit condensers having an inclined surface on an upper surface of the second base film 424 and formed to have a small cross-sectional area in an upward direction.
즉, 상기 제1구조화패턴(412) 및 상기 제2구조화패턴(422)은 각각 상기 단위집광체가 연속하여 반복적으로 구비됨으로써 형성된다.That is, the first structured pattern 412 and the second structured pattern 422 are each formed by repeatedly providing the unit condenser continuously.
여기서, 상기 제1구조화패턴(412)과 상기 제2구조화패턴(422)은 도시된 바와 같이 동일한 형태 및 크기의 상기 단위집광체로 구성될 수도 있고, 이와 달리 서로 다른 형태나 크기를 가지도록 형성될 수도 있다.Here, the first structured pattern 412 and the second structured pattern 422 may be composed of the unit condensers having the same shape and size as shown, or may be formed to have different shapes or sizes. It may be.
이와 같이 상기 집광시트(400)는 상기 상부광학시트(410)와 상기 하부광학시트(420)를 포함하며, 상기 상부광학시트(410)와 상기 하부광학시트(420)가 교차 배치된 형태로 배치된다. 여기서 상부광학시트(410)와 상기 하부광학시트(420)는 서로 적층되거나 접합될 수 있다.As such, the light condensing sheet 400 includes the upper optical sheet 410 and the lower optical sheet 420, and the upper optical sheet 410 and the lower optical sheet 420 are arranged to cross each other. do. The upper optical sheet 410 and the lower optical sheet 420 may be stacked or bonded to each other.
또한, 상기 집광시트(400)가 역프리즘 형태로 형성되어 하면에 상기 단위집광체가 구비됨으로써 광의 내부 전반사를 통해 집광시키도록 구성될 수도 있다.In addition, the light collecting sheet 400 may be formed to have an inverted prism shape so that the unit light collecting body is provided on a lower surface thereof to condense light through total internal reflection of light.
한편, 상기 접착층(200)은 상기 확산시트(300)와 상기 집광시트(400)의 둘레를 따라 적어도 일부에 구비되며 상기 확산시트(300)와 상기 집광시트(400)를 접합시켜 박리가 발생하는 것을 방지한다.On the other hand, the adhesive layer 200 is provided at least in part along the circumference of the diffusion sheet 300 and the light collecting sheet 400 and the peeling occurs by bonding the diffusion sheet 300 and the light collecting sheet 400. To prevent them.
구체적으로, 상기 접착층(200)은, 도 2 및 도 3에 도시된 바와 같이 상기 확산시트(300)와 상기 집광시트(400) 사이에서 이를 접합시키도록 구성되어 있으며, 둘레에 따라 최외각에 도포된다.Specifically, the adhesive layer 200, as shown in Figures 2 and 3 is configured to bond between the diffusion sheet 300 and the light collecting sheet 400, it is applied to the outermost along the circumference do.
그리고 이와 같이 도포된 상기 접착층(200)에 의해 상기 확산시트(300)와 상기 집광시트(400)가 접착된 후 타발 작업을 통해 상기 확산시트(300), 상기 집광시트(400) 및 상기 접착층(200)의 일부를 제거하게 된다.The diffusion sheet 300 and the light collecting sheet 400 are adhered to each other by the adhesive layer 200 applied as described above, and then, through the punching operation, the diffusion sheet 300, the light collecting sheet 400, and the adhesive layer ( A part of 200) will be removed.
즉, 상기 접착층(200)은 상기 확산시트(300)와 상기 집광시트(400)의 접합을 위한 최소한의 영역만 남긴 후 제거된다.That is, the adhesive layer 200 is removed after leaving only a minimum area for bonding the diffusion sheet 300 and the light collecting sheet 400.
한편, 이와 함께 상기 접착층(200)은 별도의 블랙잉크(미도시)를 포함하며, 상기 집광시트(400)와 상기 확산시트(300) 사이의 내부공간(S)에서 외부로 새어나가 손실되는 것을 차폐하도록 구성된다.On the other hand, the adhesive layer 200 includes a separate black ink (not shown), which is leaked to the outside in the internal space (S) between the light collecting sheet 400 and the diffusion sheet 300 is lost. Configured to shield.
즉, 상기 접착층(200)은 적어도 일부에 상기 블랙잉크를 포함하며, 이에 따라 빛 샘 현상이 발생하는 것을 차폐하는 차광 테이프역할을 함께 수행할 수 있다.That is, the adhesive layer 200 may include at least a portion of the black ink, and thus may serve as a light shielding tape to shield occurrence of light leakage.
보다 상세하게 살펴보면, 본 발명에 따른 상기 접착층(200)은, 상기 집광시트(400) 및 상기 확산시트(300)의 둘레 중에서 상기 광원(110)이 위치한 측인 제1영역(A)에 구비되며 상기 블랙잉크를 포함하는 차폐부(210) 및 상기 차폐부(210)를 제외한 나머지 부분인 제2영역(B)에 구비되어 상기 집광시트(400)와 상기 확산시트(300)를 접합시키는 접합부(220)를 포함한다.Looking in more detail, the adhesive layer 200 according to the present invention is provided in the first area (A) which is the side of the light source 110 is located around the light collecting sheet 400 and the diffusion sheet 300 and the Bonding portion 220 provided in the shielding portion 210 including the black ink and the second region (B) except for the shielding portion 210 to bond the light collecting sheet 400 and the diffusion sheet 300 ).
상기 차폐부(210)는 도시된 바와 같이 상기 광원(110)과 인접한 제1영역(A)에 구비되며, 상기 블랙잉크를 포함함으로써, 접착기능에 추가로 차광 테이프 역할을 수행할 수 있다. 즉, 복수 개로 구성된 상기 광원(110)의 광이 미치지 못하는 부분이나 유격으로 인해 발생하는 광의 세기 편차를 저감시킬 수 있다.The shielding portion 210 is provided in the first region A adjacent to the light source 110 as shown, and includes the black ink, thereby serving as a light shielding tape in addition to the adhesive function. That is, it is possible to reduce the variation in the intensity of the light generated due to the portion or the gap that the light of the plurality of light sources 110 does not reach.
한편, 상기 접합부(220)는 상기 제2영역(B)상에서 구비되며, 상기 집광시트(400)와 상기 확산시트(300)의 박리가 발생하는 것을 방지하도록 접합시킨다.On the other hand, the bonding portion 220 is provided on the second area (B), it is bonded to prevent the separation of the light collecting sheet 400 and the diffusion sheet (300).
이때, 도시된 바와 같이 상기 접합부(220)는 상술한 상기 블랙잉크를 포함할 수도 있고, 이와 달리 접착제만으로 구성될 수도 있다.In this case, as shown, the junction 220 may include the black ink described above, or alternatively, may be composed of only an adhesive.
이와 같이 상기 접착층(200)은 상기 차폐부(210) 및 상기 접합부(220)를 포함하며, 상기 집광시트(400)와 상기 확산시트(300)를 안정적으로 접합시킴과 동시에 최외각 부분의 외관을 개선하여 박리가 일어나는 것을 방지할 수 있다.As described above, the adhesive layer 200 includes the shielding portion 210 and the bonding portion 220, and stably bonds the light collecting sheet 400 and the diffusion sheet 300 to the outside of the outermost portion. The improvement can be prevented from occurring.
또한, 상기 접착층(200)이 블랙잉크를 포함하는 경우, 상기 발광유닛(100)에서 출사된 광이 상기 내부공간(S) 외부로 새어나가는 것을 방지하여 광의 세기 편차가 발생하는 것을 저감시킬 수 있다.In addition, when the adhesive layer 200 includes a black ink, the light emitted from the light emitting unit 100 may be prevented from leaking out of the internal space S, thereby reducing the variation in the intensity of light. .
이상으로 본 발명의 실시예에 따른 광학시트 모듈을 포함하는 백라이트 유닛의 구성에 대해 개략적으로 살펴보았으며, 이어서, 도 4 및 도 5를 참조하여 상기 접합부(220)의 변형된 형태에 대해서 살펴보면 다음과 같다.The configuration of the backlight unit including the optical sheet module according to the embodiment of the present invention has been described above. Next, a modified form of the junction 220 will be described with reference to FIGS. 4 and 5. Same as
도 4는 도 2의 광학시트 모듈에서 접착층(200)의 변형된 상태를 나타낸 도면이고, 도 5는 도 4의 광학시트 모듈에서 접착층(200)의 상하 단면 형태를 나타낸 도면이다.4 is a view illustrating a modified state of the adhesive layer 200 in the optical sheet module of FIG. 2, and FIG. 5 is a top and bottom cross-sectional view of the adhesive layer 200 in the optical sheet module of FIG. 4.
먼저, 도 4를 살펴보면, 상술한 바와 달리 상기 접합부(220)가 상기 제2영역(B) 전체에 도포되지 않고 복수 개가 일정한 패턴을 가지며, 이격되어 배치된다.First, referring to FIG. 4, unlike the above description, the junction part 220 is not applied to the entire second area B, but a plurality of them have a predetermined pattern and are spaced apart from each other.
구체적으로 상기 접합부(220)는 상기 제2영역(B)내에서 복수 개가 이격 배치됨으로써, 상기 확산시트(300)의 둘레부분 상면에 모두 도포되지 않고 일부만 도포되어 하부로부터 전달되는 광을 보다 안정적으로 확산시킬 수 있다.In detail, the plurality of bonding parts 220 are disposed to be spaced apart from each other in the second area B, so that only a part of the bonding part 220 is not applied to the upper surface of the circumferential part of the diffusion sheet 300 so that light transmitted from the lower part is more stably. Can spread.
이때, 상기 접합부(220)는, 도 5에 도시된 바와 같이 다양한 형태의 상하 단면 형상을 가지도록 구성될 수 있으며, 특성에 따라 상기 접합부(220)의 크기 및 이격 간격을 다르게 형성할 수 있다.In this case, the junction 220 may be configured to have a vertical cross-sectional shape of various forms, as shown in Figure 5, it may be formed differently the size and spacing interval of the junction 220 according to the characteristics.
특히, 도면에 도시되지는 않았지만 상기 접합부(220)는 상기 광원(110)과 멀어지는 방향으로 갈수록 접착폭이 작아지도록 형성될 수도 있다.In particular, although not shown in the drawings, the junction 220 may be formed to have a smaller adhesive width toward the direction away from the light source 110.
이는 상기 광원(110)에서 멀어질수록 광의 세기가 약해지며, 이에 따라 발생하는 광의 세기 편차가 줄어들기 때문이다.This is because light intensity decreases as the light source 110 moves away from the light source 110, and thus the variation in the intensity of light generated by the light source 110 decreases.
접합부(222)는 도 5에 도시된 바와 같이 다양한 형태로 접합부(220)의 형상이 형성될 수 있으며, 상기 접합부(220)의 단면 형상에 따라 상부의 집광시트(400)의 하부에 접합되는 면적이 변화하며, 이에 따라 휘도가 변화하게 된다.The junction portion 222 may be formed in the shape of the junction portion 220 in various forms as shown in Figure 5, the area bonded to the lower portion of the light collecting sheet 400 of the upper according to the cross-sectional shape of the junction portion 220 This changes, and thus the luminance changes.
구체적으로 도 5의 (a)와 같이 상기 접합부(220)의 상하 단면이 사각형의 형상을 가지는 경우 상부의 하부광학시트(420)와 접합되는 면적이 커서 접착력이 증가하게 되지만 접착면적에 따라 광손실이 발생될 수 있어 휘도는 감소할 수 있다.Specifically, when the upper and lower cross-sections of the junction 220 have a quadrangular shape as shown in FIG. 5 (a), the area bonded to the lower optical sheet 420 at the upper part is large, and thus the adhesive force is increased, but the light loss depends on the adhesion area. Can be generated so that the brightness can be reduced.
이와 반대로, 도 5의 (b)와 같이 상기 접합부(220)의 상하 단면이 퍼지게 형성되는 경우 도 5의 (a)패턴대비 접착력이 감소하지만, 상대적으로 휘도가 증가하게 된다.On the contrary, when the upper and lower cross-sections of the junction 220 are spread as shown in FIG. 5 (b), the adhesive force decreases compared to the pattern of FIG. 5 (a), but the luminance is relatively increased.
또한, 도 5의 (c)와 같이 상기 접합부(220)의 상하 단면 형상이 삼각형인 경우 상기 하부광학시트(420)와 접합되는 면적이 감소하여 접착력이 떨어지게 되지만, 전체적인 휘도 상승률을 극대화할 수 있다.In addition, as shown in (c) of FIG. 5, when the upper and lower cross-sectional shapes of the junction 220 are triangular, the area bonded to the lower optical sheet 420 decreases to decrease adhesive strength, but the overall luminance increase rate may be maximized. .
즉, 도 5에 도시된 바와 같이 상기 접합부(220)의 상하방향에 따른 단면 형상에 따라 전체적인 휘도와 하부광학시트(420)와의 접착력이 조절이 가능할 수 있다.That is, as shown in FIG. 5, the overall brightness and the adhesive force with the lower optical sheet 420 may be adjusted according to the cross-sectional shape in the vertical direction of the junction 220.
다음으로, 도 6 및 도 7을 참조하여, 본 발명에 따른 상기 광학시트 모듈에서 접착층(200)에 별도의 비드(230) 또는 반사코팅(240)이 더 포함된 구성에 대해 살펴보면 다음과 같다.Next, referring to Figures 6 and 7, look at the configuration in which the additional bead 230 or the reflective coating 240 is further included in the adhesive layer 200 in the optical sheet module according to the present invention.
도 6은 도 2의 광학시트 모듈에서 접착층(200) 내부에 별도의 비드(230)가 더 포함된 상태를 나타낸 도면이고, 도 7은 도 2의 광학시트 모듈에서 접착층(200)에 별도의 반사코팅(240)이 더 구비된 상태를 나타낸 도면이다.6 is a view illustrating a state in which an additional bead 230 is further included inside the adhesive layer 200 in the optical sheet module of FIG. 2, and FIG. 7 is a separate reflection on the adhesive layer 200 in the optical sheet module of FIG. 2. A diagram showing a state in which the coating 240 is further provided.
먼저 도 6을 살펴보면, 본 발명에 따른 상기 접착층(200)은 상술한 접착제와 상기 블랙잉크뿐만 아니라 별도의 실리카 비드(230)를 더 포함할 수 있다.First, referring to FIG. 6, the adhesive layer 200 according to the present invention may further include separate silica beads 230 as well as the adhesive and the black ink.
구체적으로 상기 접착층(200) 내부에 상기 비드(230)가 포함됨으로써, 상기 접착층(200) 자체의 결합력을 증가시켜 상기 집광시트(400) 및 상기 확산시트(300)의 변형을 최소화할 수 있다.Specifically, since the bead 230 is included in the adhesive layer 200, the bonding force of the adhesive layer 200 itself may be increased to minimize deformation of the light collecting sheet 400 and the diffusion sheet 300.
일반적으로 상기 집광시트(400) 및 상기 확산시트(300)의 접합 시 온도 및 습도 변화에 의해 변형이 발생하며, 이때, 상기 접착층(200)이 이를 지지함으로써 변형을 방지할 수 있다.In general, deformation occurs due to temperature and humidity changes when the light collecting sheet 400 and the diffusion sheet 300 are bonded to each other. In this case, the adhesive layer 200 may prevent the deformation by supporting it.
본 실시예에서 상기 접착층(200)은 상기 블랙잉크와 함께 상기 비드(230)를 포함할 수 있으며, 상기 접합부(220)의 경우 상기 블랙잉크를 포함하지 않고 상기 비드(230)만 포함하도록 구성될 수도 있다.In this embodiment, the adhesive layer 200 may include the bead 230 together with the black ink, and the bonding part 220 may be configured to include only the bead 230 without the black ink. It may be.
이어서, 도 6을 살펴보면, 상기 접착층(200)에 상기 실리카 비드(230)가 아닌 별도의 반사코팅(240)이 더 포함될 수 있다.Subsequently, referring to FIG. 6, a separate reflection coating 240 may be further included in the adhesive layer 200 instead of the silica beads 230.
구체적으로 상기 접착층(200)은 하부에 별도의 반사코팅(240)이 구비되며, 이에 따라 상기 내부공간(S)에서 외부로 새어나가는 광을 반사할 수 있다.Specifically, the adhesive layer 200 is provided with a separate reflection coating 240 at the bottom, thereby reflecting the light leaking out from the internal space (S).
즉, 상기 반사코팅(240)은 상기 확산시트(300) 및 상기 집광시트(400)의 최 외각에서 손실되는 광을 리사이클링시켜 다시 상기 내부공간(S)으로 전달하여, 전체적으로 휘도가 증가하도록 한다.That is, the reflective coating 240 recycles the light lost at the outermost sides of the diffusion sheet 300 and the light collecting sheet 400 and transfers the light back to the internal space S, thereby increasing the overall brightness.
본 실시예에서 상기 반사코팅(240)은 은(Ag)으로 구성되며, 이와 달리 다양한 소재가 적용될 수 있다.In the present exemplary embodiment, the reflective coating 240 is made of silver (Ag), and various materials may be applied thereto.
여기서도 마찬가지로 상기 접착층(200)은 적어도 일부에 블랙잉크를 포함하도록 구성되며, 상기 차폐부(210)와 달리 상기 접합부(220)의 경우 상기 블랙잉크를 포함하지 않도록 구성될 수도 있다.In this case, the adhesive layer 200 may be configured to include black ink at least in part, and unlike the shielding part 210, the bonding part 220 may not be configured to include the black ink.
이상과 같이 본 발명에 따른 바람직한 실시예를 살펴보았으며, 앞서 설명된 실시예 이외에도 본 발명이 그 취지나 범주에서 벗어남이 없이 다른 특정 형태로 구체화 될 수 있다는 사실은 해당 기술에 통상의 지식을 가진 이들에게는 자명한 것이다. 그러므로, 상술된 실시예는 제한적인 것이 아니라 예시적인 것으로 여겨져야 하고, 이에 따라 본 발명은 상술한 설명에 한정되지 않고 첨부된 청구항의 범주 및 그 동등 범위 내에서 변경될 수도 있다.As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

Claims (9)

  1. 둘레에 따른 일측에 배치되는 광원 및 상기 광원에서 출사된 광을 상부로 전달하는 도광부를 포함하는 발광유닛의 상부에 적층되는 광학시트 모듈에 있어서,In the optical sheet module laminated on the upper portion of the light emitting unit including a light source disposed on one side along the circumference and a light guide unit for transmitting the light emitted from the light source to the upper,
    일면에 하부에서 전달되는 광을 집광하여 상부로 전달하는 단위집광체가 형성된 집광시트; A light condensing sheet having a unit condenser for condensing light transmitted from the lower part to one side and transmitting the light to the upper part;
    상기 집광시트의 하부에서 적층되며 하부에서 전달되는 광을 확산하여 상기 집광시트로 전달하는 확산시트; 및A diffusion sheet stacked at the bottom of the light collecting sheet and diffusing the light transmitted from the bottom to the light collecting sheet; And
    상기 확산시트와 상기 집광시트의 둘레를 따라 적어도 일부에 구비되어 상기 확산시트와 상기 집광시트를 접합시켜 박리가 발생하는 것을 방지하는 접착층;An adhesive layer provided on at least a portion of the diffusion sheet and the light collecting sheet to surround the diffusion sheet and the light collecting sheet to prevent peeling from occurring;
    을 포함하는 광학시트 모듈.Optical sheet module comprising a.
  2. 제1항에 있어서,The method of claim 1,
    상기 접착층은 내부에 블랙잉크를 포함하여 상기 집광시트와 상기 확산시트 사이의 내부공간에서 광이 외부로 손실되는 것을 차폐하는 광학시트 모듈.The adhesive layer includes a black ink therein to shield the light loss to the outside in the internal space between the light collecting sheet and the diffusion sheet.
  3. 제2항에 있어서,The method of claim 2,
    상기 접착층은,The adhesive layer,
    상기 집광시트 및 상기 확산시트의 둘레 중에서 상기 광원이 위치한 측인 제1영역에 구비되며 상기 블랙잉크를 포함하는 차폐부; 및A shielding portion provided in a first area of the periphery of the light collecting sheet and the diffusion sheet, the light source being located, and including the black ink; And
    상기 차폐부를 제외한 나머지 부분인 제2영역에 구비되어 상기 집광시트와 상기 확산시트를 접합시키는 접합부;A junction part provided in a second area of the remaining part except for the shielding part to bond the light collecting sheet and the diffusion sheet;
    를 포함하는 광학시트 모듈.Optical sheet module comprising a.
  4. 제3항에 있어서,The method of claim 3,
    상기 접합부는,The junction portion,
    상기 제2영역내에서 일정한 패턴을 가지며, 복수 개가 이격되어 배치되는 광학시트 모듈.The optical sheet module having a predetermined pattern in the second area, a plurality of are arranged spaced apart.
  5. 제4항에 있어서,The method of claim 4, wherein
    상기 접합부는,The junction portion,
    상기 광원에서 멀어지는 방향으로 갈수록 접착폭이 작아지도록 형성되는 광학시트 모듈.The optical sheet module is formed so as to decrease the adhesive width toward the direction away from the light source.
  6. 제3항에 있어서,The method of claim 3,
    상기 접합부는,The junction portion,
    적어도 일부에 상기 블랙잉크를 포함하여 상기 내부공간에서 광이 외부로 나가는 것을 차폐하는 광학시트 모듈.At least a part of the optical sheet module including the black ink to shield the light from going out in the inner space.
  7. 제1항에 있어서, The method of claim 1,
    상기 접착층은,The adhesive layer,
    내부에 별도의 실리카 비드를 포함하여 온도 및 습도에 의해 변형이 발생하는 것을 방지하는 광학시트 모듈.Optical sheet module that includes a separate silica beads inside to prevent deformation caused by temperature and humidity.
  8. 제1항에 있어서,The method of claim 1,
    상기 접착층은,The adhesive layer,
    하부에 별도의 반사코팅이 구비되어 내부공간에서 외부로 손실되는 광을 리사이클링 시키는 광학시트 모듈.An optical sheet module having a separate reflection coating at the bottom to recycle light lost from the internal space to the outside.
  9. 제1항 내지 제8항 중 어느 한 항의 광학시트 모듈을 포함하는 백라이트 유닛.A backlight unit comprising the optical sheet module of claim 1.
PCT/KR2017/007938 2016-07-26 2017-07-24 Bonded-type optical sheet module WO2018021774A1 (en)

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KR1020160095013A KR20180012137A (en) 2016-07-26 2016-07-26 Bonded Type Optical Sheet Module And Back Light Unit Using The Same

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KR102221196B1 (en) 2018-11-16 2021-03-03 주식회사 엘엠에스 A diffusion sheet having improved shielding performance and a backlight unit including the diffusion sheet
KR102513442B1 (en) * 2020-11-06 2023-03-24 주식회사 엘엠에스 Optical film and back light unit incuding the same

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JP2004231736A (en) * 2003-01-29 2004-08-19 Dainippon Ink & Chem Inc Light-reflecting / light-shielding adhesive tape
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KR20130077708A (en) * 2011-12-29 2013-07-09 제일모직주식회사 Prism sheet, back light unit comprising the same and optical display apparatus comprising the same

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KR20130005330A (en) * 2011-07-06 2013-01-16 글로텍 주식회사 Optical film and manufacturing method thereof, liquid cristal display apparatus using the optical film
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JPH09288215A (en) * 1996-02-20 1997-11-04 Nissha Printing Co Ltd Surface light emitting device
JP2004231736A (en) * 2003-01-29 2004-08-19 Dainippon Ink & Chem Inc Light-reflecting / light-shielding adhesive tape
JP2007173031A (en) * 2005-12-22 2007-07-05 Dainippon Printing Co Ltd Light control sheet, and surface light source device
JP2009116014A (en) * 2007-11-06 2009-05-28 Toppan Printing Co Ltd Lens sheet, optical sheet for display, and backlight unit and display device using the same
KR20130077708A (en) * 2011-12-29 2013-07-09 제일모직주식회사 Prism sheet, back light unit comprising the same and optical display apparatus comprising the same

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